20814377 has 2 divisors, whose sum is σ = 20814378. Its totient is φ = 20814376.

The previous prime is 20814371. The next prime is 20814397. The reversal of 20814377 is 77341802.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 19855936 + 958441 = 4456^2 + 979^2 .

It is a cyclic number.

It is not a de Polignac number, because 20814377 - 2¹² = 20810281 is a prime.

It is not a weakly prime, because it can be changed into another prime (20814371) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 10407188 + 10407189.

It is an arithmetic number, because the mean of its divisors is an integer number (10407189).

Almost surely, 2^20814377 is an apocalyptic number.

It is an amenable number.

20814377 is a deficient number, since it is larger than the sum of its proper divisors (1).

20814377 is an equidigital number, since it uses as much as digits as its factorization.

20814377 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 20814377 is about 4562.2776110184. The cubic root of 20814377 is about 275.0771221712.

The spelling of 20814377 in words is "twenty million, eight hundred fourteen thousand, three hundred seventy-seven".